c++ - 如何在 Bazel 项目中设置 Catch2

Question

我已经启动了一个简单的 C++ 项目，该项目使用 Bazel 作为构建系统，并希望将 Catch2 作为测试框架添加到其中。

到目前为止，这是我的项目的样子:

WORKSPACE -> empty file
src/
  Money.hpp
  Money.cpp
BUILD

BUILD 在哪里

cc_library(
  name = "Money",
  srcs = ["Money.cpp"],
  hdrs = ["Money.hpp"]
)

我希望能够为每个 cc_library 创建测试，在本例中为 Money。我尝试设置它但与 Catch2 main 混淆了。任何关于如何做到最好的建议都将不胜感激!

Answer 1

Bazel 开箱即用地支持 Catch2 (v2.13.0)。

示例

WORKSPACE.bazel:

workspace(name = "Catch2Demo")

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "catch2",
    strip_prefix = "Catch2-2.13.0",
    urls = ["https://github.com/catchorg/Catch2/archive/v2.13.0.tar.gz"],
)

BUILD.bazel:

cc_test(
    name = "my_test",
    srcs = ["my_test.cpp"],
    defines = ["CATCH_CONFIG_MAIN"],
    deps = [
        "@catch2",
    ],
)

my_test.cpp:

#include <catch2/catch.hpp>

unsigned int Factorial( unsigned int number ) {
    return number <= 1 ? number : Factorial(number-1)*number;
}

TEST_CASE( "Factorials are computed", "[factorial]" ) {
    REQUIRE( Factorial(1) == 1 );
    REQUIRE( Factorial(2) == 2 );
    REQUIRE( Factorial(3) == 6 );
    REQUIRE( Factorial(10) == 3628800 );
}